<template>
  <div class="picture-upload">
    <a-upload
      list-type="picture-card"
      :show-upload-list="false"
      :custom-request="handleUpload"
      :before-upload="beforeUpload"
    >
      <img v-if="picture?.url" :src="picture?.url" alt="avatar" />
      <div v-else>
        <loading-outlined v-if="loading"></loading-outlined>
        <plus-outlined v-else></plus-outlined>
        <div class="ant-upload-text">点击或拖拽上传图片</div>
      </div>
    </a-upload>
  </div>
</template>
<script lang="ts" setup>
import { ref } from 'vue'
import { PlusOutlined, LoadingOutlined } from '@ant-design/icons-vue'
import { message } from 'ant-design-vue'
import type { UploadChangeParam, UploadProps } from 'ant-design-vue'
import { uploadPictureUsingPost } from '@/api/pictureController.ts'

// 定义接口
interface Props {
  picture?: API.PictureVo
  onSuccess?: (newPicture: API.PictureVo) => void
}

// 定义props
const props = defineProps<Props>()

function getBase64(img: Blob, callback: (base64Url: string) => void) {
  const reader = new FileReader()
  reader.addEventListener('load', () => callback(reader.result as string))
  reader.readAsDataURL(img)
}

const fileList = ref([])
const loading = ref<boolean>(false)
const imageUrl = ref<string>('')

const handleChange = (info: UploadChangeParam) => {
  if (info.file.status === 'uploading') {
    loading.value = true
    return
  }
  if (info.file.status === 'done') {
    // Get this url from response in real world.
    getBase64(info.file.originFileObj, (base64Url: string) => {
      imageUrl.value = base64Url
      loading.value = false
    })
  }
  if (info.file.status === 'error') {
    loading.value = false
    message.error('upload error')
  }
}

const beforeUpload = (file: UploadProps['fileList'][number]) => {
  const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png'
  if (!isJpgOrPng) {
    message.error('不支持上传该格式的图片，推荐使用jpg或png')
  }
  const isLt2M = file.size / 1024 / 1024 < 2
  if (!isLt2M) {
    message.error('不能上传大于2M的图片')
  }
  return isJpgOrPng && isLt2M
}

const handleUpload = async ({ file }: any) => {
  loading.value = true
  try {
    const params = props.picture ? { id: props.picture.id } : {}
    const res = await uploadPictureUsingPost(params, {}, file)
    if (res.data.code === 0 && res.data.data) {
      message.success('图片上传成功')
      props.onSuccess?.(res.data.data)
    } else {
      message.error('图片上传失败' + res.data.message)
    }
  } catch (error) {
    message.error('图片上传失败')
  } finally {
    loading.value = false
  }
}
</script>
<style scoped>
.picture-upload :deep(.ant-upload) {
  width: 100% !important;
  height: 100% !important;
  min-height: 152px;
  min-width: 152px;
}

.picture-upload img {
  max-width: 100%;
  max-height: 480px;
}

.ant-upload-select-picture-card i {
  font-size: 32px;
  color: #999;
}

.ant-upload-select-picture-card .ant-upload-text {
  margin-top: 8px;
  color: #666;
}

</style>
